ISRO Resourcesat Data Dictionary

Acquisition Date

• Field Definition:  The acquisition date refers to the year, month, and day the scene was acquired.

               Format:
               YYYY/MM/DD
               YYYY = Year
               MM = Month
               DD = Day
 

Coordinates Decimal Degrees

• Field Definition:  The latitude and longitude are provided in decimal degrees for the following fields:

                 Values:      
                 Scene Center Latitude and Longitude
                 Northeast (NE) Corner Latitude and Longitude
                 Northwest (NW) Corner Latitude and Longitude
                 Southeast (SE) Corner Latitude and Longitude
                 Southwest (SW) Corner Latitude and Longitude

                 Latitude Format Decimal Degrees: -90.000 through 90.000
                 Longitude Format Decimal Degrees: -180.000 through 180.000

                 Number of decimal places will vary by dataset – check collection in EE.
 

Coordinates Degrees, Minutes, Seconds

• Field Definition:  The latitude and longitude are provided in degrees, minutes, and seconds for the following fields:

                 Values:
                 Scene Center Latitude and Longitude
                 Northeast (NE) Corner Latitude and Longitude
                 Northwest (NW) Corner Latitude and Longitude
                 Southeast (SE) Corner Latitude and Longitude
                 Southwest (SW) Corner Latitude and Longitude

                Longitude Format:
                DDDMMSS.SSH
                DDD = Degree(s) with a range of 0 through 180
                MM = Minute(s) with a range of 0 through 59
                SS.SS = Second(s) with a range of 0 through 59.99
                H = Hemisphere with E for east and W for west

                Latitude Format:
                DDMMSS.SSH
                DD = Degree(s) with a range of 0 through 90
                MM = Minutes(s) with a range of 0 through 59
                SS.SS = Second(s) with a range of 0 through 59.99
                H = Hemisphere with N for north and S for south
 

Datum

• Field Definition:  The horizontal reference system associated with the image.

              Values:
              WGS84 = World Geodetic System 1984

Entity ID

• Field Definition:  This field describes the naming convention of each scene.

               Format:
               SSsssPPPRRRMMDDYYYY
               SS = Satellite
               sss = Sensor
               MM = Month of Acquisition
               DD = Day of Acquisition
               YYYY = Year of Acquisition
               PPP = Path Number
               RRR = Row Number

               Example: R2LS312052017251035
 

File Format

• Field Definition:  Data format available for download.

               Values:
               GEOTIFF = Geostationary Earth Orbit Tagged Image File Format
 

Lines

• Field Definition:  The number of product lines available for the data.
   

Map Projection

• Field Definition:  The method used to represent the 3-dimensional surface of the earth for the product.

               Values:
               UTM = Universal Transverse Mercator
               LCC = Lambert Conformal Conic

Path

• Field Definition:  The satellite path number is part of the IRS referencing scheme which is unique for each satellite mission and identifies the geographic location of data on the earth using path and row.
   

Processing Level Available

• Field Definition:  All scenes in the USGS EROS inventory are initially processed to Level-1G (L1G) which includes radiometric and geometric corrections. Scenes with sufficient ground control data for terrain correction are also processed to Level-1T (L1T).

               Values:
               ALL = Returns all available scenes in the USGS EROS inventory
               Level 1G Available = Returns all scenes processed to L1G
               Level 1T Available = Returns all scenes processed to L1T
 

Resampling Technique

• Field Definition:  The resampling method applied to the scene.
  
    Valid Codes:
    CC = Cubic Convolution
   

Row

• Field Definition:  The satellite row number is part of the IRS referencing scheme which is unique for each satellite mission and identifies the geographic location of data on the earth using path and row.
   

Samples

• Field Definition:  The number of product samples available for the data.
   

Satellite

• Field Definition:  The Indian Remote Sensing (IRS) platform used to acquire the data.

              Values:
              IRS-R1 = IRS Resourcesat-1 also known as IRS-P6
              IRS-R2 = IRS Resourcesat-2
 

Sensor

• Field Definition:  The satellite instrument used to acquire the data.

               Values:
               L3 = Linear Imaging Self Scanning Sensor-3
               AW = Advanced Wide Field Sensor
 

Sun Azimuth

• Field Definition:  Sun azimuth angle (degrees) at the scene center. A positive value (+) indicates angles to the East or clockwise from North. Zero indicates North. A negative value (-) indicates angles to the West or counterclockwise from North.

              Values:
              -180.000 through +180.000 degrees
 

Sun Elevation

• Field Definition:  Sun elevation angle (degrees) at the scene center. A positive value (+) indicates a daytime scene. Zero indicates a nighttime scene. A negative value (-) indicates a nighttime scene.

              Values:
              -90.000 through +90.000 degrees
 

UTM Zone

• Field Definition:  The UTM (Universal Transverse Mercator) zone used to project the location of the scene.
   

Vendor ID

• Field Definition:  The filename assigned by ISRO to the LISS-3 or AWiFS product.